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Finding the Fourth Proportional to 425.28, 587.04 and 285.60

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Solution

The fourth proportional to 425.28, 587.04 and 285.60 is: 394.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.28 : 587.04 = 285.60 : x
  2. Step 2: Convert to fraction form
    425.28/587.04 = 285.60/x
  3. Step 3: Cross multiply
    425.28x = 587.04 × 285.60
  4. Step 4: Simplify right side
    425.28x = 167,658.62
  5. Step 5: Solve for x
    x = 167,658.62/425.28
  6. Step 6: Final answer
    x = 394.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.